782 MONOGRAPHS OP NORTH AMERICAN RODENTIA. 



SYNOPSIS OF THE SPECIES AND VARIETIES OF TAMIAS. 



I. Premolars 1 : 



1. Doreal surface with two white Stripes and live black ones; ramp rufous; tail (with tin- hairs) three- 



ton ri lis ot' tin- length Hi' the head and bod; striatus. 



II. Premolars t : 



2. Dorsal surface with four white (or grayish-white) stripes and five black ones; rump grayish; tail 



(with the hairs) equal to the head and body ASIATICOS. 



a. Sides of body fulvous; dorsal stripes distinct, the white ones more or less mixed with grayish, 



the dark ones black var. boreal is. 



i. Sides of body bright rusty or gohleu ; white of the dorsal stripes purer ; the dark stripes strong, 



varying from dark chestnut to black var. quadrivittalus. 



c. Merely a faint wash of fulvous on the sides of the body ; the dark stripes of the dorsal surface 



very pale chestnut or dark browu rather than black; rump and nape pale whitish-gray; 

 size small var. pallidas. 



d. Colors everywhere pale ; the dorsal stripes obsolete, or nearly so, the medial only being very 



prominent var. dorsal is. 



e. General color above dull yellowish-brown; the light stripes scarcely lighter than the geueral 



color of the dorsal surface; the dark stripes black and strong; size large .var. townsendi. 



3. Above gray, with two broad stripes of white; sides reddish-gray ; tail (with the hairs) rather more 



than half the length of the head and body, with the central portion white beneath ; ears 

 small iiarkisi. 



4. Above gray, with two white stripes, each bordered on both sides with black, the outer black stripe 



much broader than the inner; tail (with the hairs) about one-half the length of the head 

 and body later alis. 



Tamias as above defined includes four species, one of which runs into 

 several localized races, or subspecies. All are represented in North America; 

 three of the species (T. striatus, T. harrisi, and T. lateralis) are not found 

 elsewhere, while the fourth ( T. asiaticus), in some of its forms, ranges over 

 not only the western half of North America, but over a large portion of 

 Northern Asia and Eastern Europe. 



TAMIAS STRIATUS (Linn.) Baird. 



Striped Squirrel ; Common Chipmunk. 



Sciurus striatus Catesby, Carol, ii, 1731, 75, pi. lxxv. — Linnjeus, Mns. Adolph. Frid. Regis, i, 1754,8 

 (based wholly on an American specimen; cites only Catesby and Edwards); Syst. Nat. i, 

 1758, 64 (same as the preceding) ; ib. 1706, 87 (almost wholly, but includes references to the 

 Siberian animal). — Schrebeh, Siiuget. iv, 1791,791 (in part; "B. Das amerikanische" and its 

 synonyms only). — Erxleben, Syst. Reg. Anim. 1777, 426 (refers almost exclusively to the 

 American "Ground" Squirrel of the Eastern United States). — Desmarest, Mam. 1822, 339 

 (in part). — Harlan, Fauu. Amer. 1825, 183 (in part). — Godman, ii, 1826, 142. — Emmons, 

 Quad. Mass, 1840, 68.— Thompson, Hist. Vermont, 1842, 46.— De Kay, New York Zcol. i, 1842, 

 62, pi. xvi, tig. 2. 



M iiD s us striatus Bodd^ert, Elenchus Animal, i, 1784, 122. 



Sciurus striatus, (3 amerieanus G.melin, Syst. Nat. i, 1788, 150. — Fischer, Synop. Mam. 1829, 348. 



Tamias americaua KriiL, Beitiiigc zur Zoologie, 1820, 69. — Gray, Ann. and Mag. Nat. Hist. 3d ser. xx, 

 l-r.7, 436 (= T. striatus Baird). 



Sciurus amerieanus FISCHER, Synop. 1829, 349 (= T. americaua Kuhl). 



Tamias striatus Baiiid, 11th Ann. Rep. Smiths. Inst. 1857, 55, foot-uote ; Mam. N. Amer. 1857, 292, pi. xlvi, 

 fig. 2.— Kennicott, Rep. U. S. Pat. Off. Agric. for 1856 (1857), 70, pi. viii.— Thomas, Trans 

 III. State Agr. Soe. iv, 1860,657. — GlLPIN, Trans. Nova Scotia Inst. Nat. Sei. ii, pt. 3, 1870, 15 

 (Nova Scotia).— Allen. Bull. Mns. Com)). Zool. i, 1869, 225; Proc. Bost. Soc. Nat. Hist, xvi, 

 1874, 189. 



